A-A+
The problem with lighting if it arises often
问题详情
The problem with lighting， if it arises， often doesn‘t lie in light sources but in their applications．
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参考答案
正确答案：G
Theproblemwithlighting，ifitarises，oftendoesn"tlieinlightsourcesbutintheirapplications．译文如果照明有问题通常问题不是出在光源上，而是出在应用方法上。定位由题干关键词lightsources和applications定位到原文画线处。
